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Adsorption of strontium at K-feldspar-water interface
Applied Radiation and Isotopes, 2022Feldspars, a type of important and prevalent primary mineral in soils, play a significant role in the migration of radioactive strontium in the environment. Nevertheless, there are rare studies on strontium adsorption on feldspars. This work presents a study on the interaction between strontium and K-feldspar at the solid-water interface.
Hanyu, Wu +4 more
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Zeitschrift für Kristallographie - Crystalline Materials, 1971
Abstract Polarized infrared absorption and reflection spectra along the a-, b- and c-axis directions on single crystals of K feldspar were measured and the obtained bands were assigned. The normal coordinate treatment was made on a modified Urey-Bradley force field, and the determined force constants explain well the observed frequencies.
Kazuaki liishi +3 more
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Abstract Polarized infrared absorption and reflection spectra along the a-, b- and c-axis directions on single crystals of K feldspar were measured and the obtained bands were assigned. The normal coordinate treatment was made on a modified Urey-Bradley force field, and the determined force constants explain well the observed frequencies.
Kazuaki liishi +3 more
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Degree of Al-Si order in K-feldspar and its effect on K-feldspar’s dissolution
2021Dissolution or alteration of feldspars is controlled by many factors such as the crystal structure (e.g., Al/Si ordering), temperature, pH, surface area, organic acids, chemical affinity, and precipitation of secondary minerals. The effects of Al/Si ordering (i.e., the degree of Al/Si order) on the percentage of feldspar dissolution (i.e., the extent ...
Liu, Shanke, Zhai, Yuanyuan
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Geochimica et Cosmochimica Acta, 2013
Abstract The significance of the multi-isotopic record preserved in K-feldspars is assessed on samples from the Aar metagranite, Central Alps, Switzerland having very tight independent geological constraints. Stepwise leaching reveals that two diachronically grown K-feldspar generations coexist: Kfs-1 (⩾35 Ma old, Ca-poor, Rb–Cl-rich, with low 87Sr ...
VILLA, IGOR MARIA, Hanchar, JM
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Abstract The significance of the multi-isotopic record preserved in K-feldspars is assessed on samples from the Aar metagranite, Central Alps, Switzerland having very tight independent geological constraints. Stepwise leaching reveals that two diachronically grown K-feldspar generations coexist: Kfs-1 (⩾35 Ma old, Ca-poor, Rb–Cl-rich, with low 87Sr ...
VILLA, IGOR MARIA, Hanchar, JM
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Lithos, 2019
Abstract Diffusion of Ca has been characterized in natural K-feldspar under dry, 1 atm conditions using a 44Ca tracer. Polished sections of feldspar were surrounded by source powders in Pt capsules and annealed in air, or with solid buffers to buffer at NNO or IW.
D.J. Cherniak, E.B. Watson
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Abstract Diffusion of Ca has been characterized in natural K-feldspar under dry, 1 atm conditions using a 44Ca tracer. Polished sections of feldspar were surrounded by source powders in Pt capsules and annealed in air, or with solid buffers to buffer at NNO or IW.
D.J. Cherniak, E.B. Watson
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Thermoluminescence signal in K-feldspar grains: Revisited
Applied Radiation and Isotopes, 2015Recent work has shown that infrared stimulated luminescence (IRSL) signals in sedimentary coarse-grain K-feldspars are derived mainly from high temperature thermoluminescence (TL) peaks around 400°C, and the fading components of the IRSL signal can be preferentially removed by prior IR stimulation at relatively low temperature.
Gelian, Gong, Weidong, Sun, Hongyun, Xu
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Further investigations on ‘non-fading’ in K-Feldspar
Quaternary International, 2015Abstract We give a theoretical overview of non-fading infrared stimulated luminescence (IRSL) signals in feldspars, followed by intercomparison of potential methods on some sediment extracts. We observe that a more stringent thermal wash on its own is not effective in obtaining a more stable signal, suggesting that the higher the stimulation ...
Jain, M. +3 more
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